Do you know Difference of Bearing Brass Cage Steel/Plastic Cage?

The bearing cage refers to the covering parts of the rolling body, and the movement is used to isolate the rolling body. It usually guide the rolling body and keep it in the bearings.

When the rolling bearings work, especially when the load is complicated and high -speed rotation, cage withstand large centrifugal force, impact, and vibration, maintain a large sliding friction between the rack and the rolling body, and generate a lot of heat.
The result of the common effect of force and thermal can cause a shelf failure, which will cause burns and breaks in severe cases.
Therefore, maintaining the shelf material must be well -conducted, abrasion resistance, small friction coefficient, small density, a certain strength and toughness, good elasticity and stiffness. The expansion coefficient similar to the rolling body, and good processing process performance.

The commonly cage are divided into metal and non-metal material. There are also composite materials.

Bearing steel cage
Due to the characteristics of high strength, good toughness, and easy processing, steel materials are generally used in rolling bearing. In addition, it can also be obtained by using other mechanical processing methods. Commonly used steel cage include 20, 30, 45, 0CR18NI9, 1CR18NI9TI, 40CRNIMO, ML15, ML20, etc. Steel cage generally eliminate stress and restore plasticity through heat treatment. Including high temperature recovery, re -crystallization, etc. In order to reduce the friction coefficient, the surface treatment of the finished product must be kept when necessary.

Bearing brass cage

bearing brass cage material has high stretching strength and is not affected by bearing lubricants. It is often used in small and medium -sized bearings.
However, due to the high copper price, the price of the bearing brass cage is also high.
The main features are as follows:
1 type: stamping and entity, stamping is only suitable for small and medium -sized;
2 Material: brass plate, brass castings or forging;
3 advantages performance:
It is not affected by the lubricant, including synthetic oil and grease;
The density is relatively small, the limit speed is high
4 Use restrictions: bearing brass cage cannot be used in an occasion above 300 ° C. It is not suitable for ammonia (such as cooling), because ammonia will cause the seasonal crushing of brass;

Bearing plastic/nylon cage

Nylon materials have the advantages of elasticity and light weight, which has a very good sliding and self -lubricating performance.
Has the following features:
1 type: The solid frame (injecting into the type);
2 Material: Polyamide (Nylon 66);
3 Advantages performance: Polyam nylon material has the advantages of elasticity and light weight, this maintenance shelf has very good sliding and self -lubricating performance.
It is particularly suitable for the inclines of each other with vibration impact stress or high increase and subtraction, or the inner and outer circles of the bearing;
4 Use restrictions: Polyam nylon maintenance may be affected by special lubrication (corrosive additives in lubricants).
It cannot be applied to vacuum because it will become crispy due to dehydration;
5 Working temperature: The working temperature is below 120 ° C greater than -40 ° C. If the temperature is too low, the nylon will lose elasticity.

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